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Carrier AquaSnap R-32 Air-cooled Chillers Selected for Major Cooling Upgrade at Royal United Hospitals Bath
BATH, UK, 23 Feb 2022 – Two Carrier AquaSnap® 30RBP air-cooled chillers with Greenspeed® Intelligence inverter-driven speed control are providing high-performance, low noise cooling for wards and operating theatres at Royal United Hospitals Bath. The high-efficiency chillers are running on lower global warming potential (GWP) refrigerant R-32 as part of a major upgrade of the hospital’s air conditioning system.
Refrigerant R-32 is up to 10% more efficient than R-410A, the refrigerant it replaces, and its global warming potential is 68% lower. Carrier is part of Carrier Global Corporation (NYSE: CARR), the leading global provider of healthy, safe and sustainable and intelligent building and cold chain solutions. The chillers, mounted on a new roof-top platform,
replace two older split-system chillers by other manufacturers, significantly reducing servicing requirements and related costs due to their compact, fully packaged design. The selection also aligns with Carrier’s 2030 Environmental, Social and Governance goals to reduce its customers’ carbon footprint by more than 1 gigaton. Due to the combination of variable-speed electronically commutated condenser fans, high- performance Novation® heat exchangers and compressors optimised for operation with R-32, the chillers have a very high seasonal energy efficiency rating (SEER) of 5.18. The N+N system design ensures a second unit is available to take over full cooling duties in the unlikely event of a failure, providing the resilience required in this critical hospital application. “Key requirements for the project were excellent efficiency, reliability, resilience, low sound levels and reduced environmental impact, and the Carrier chillers and system design deliver this,” said James Allard, Director of Brunel Integrated Services, consultant on the project. “Carrier provided excellent support throughout
the project. There was an issue with the hospital’s electrical supply, which was limited and couldn’t be upgraded in time for the start-up of the new chillers. Carrier responded quickly and programmed a load limit into the chiller control system to ensure they would not draw more than the maximum allowed, protecting the hospital’s electrical system while ensuring cooling needs were fully met.” The chillers went into service while work continued to upgrade the electrical supply. The chillers were
also equipped with soft-start electronics, which provided a further safeguard to peak electrical load. Additional options specified included enhanced acoustic attenuation to further reduce noise given the sensitive hospital application, and Enviroshield® condenser coil protection, with a three-year warranty. “Although the National Health Service was Carrier’s
direct customer on the project, Carrier provided excellent support to the installer, Intoheat Ltd, and worked closely with them to support the project to completion,” noted James Allard. Based on the positive experience on the project,
Brunel Integrated Services recommended a similar Carrier solution for a replacement project at another hospital located in the West of England.
www.carrier.com Gilberts delivers form and functionality in healthcare reform “first”
The first community diagnostics hub of its kind in England is now open and delivering a healthy environment for patients through its ventilation.
The Rutherford Diagnostic Centre Somerset in Taunton is the first to open in response to recommendations made in an independent review, recommending such facilities be created in free- standing, accessible locations to provide quicker and easier access to patients(1). Phase 1 of the new facility provides two MRI
rooms, two CT scan rooms and an ultrasound room, equipped with cutting-edge diagnostic equipment and cannulation rooms plus support consulting rooms and reception. It has been delivered by Kier with Totus Engineering as building services contractor, fulfilling the brief developed by consultants Steven A Hunt and using grilles and diffusers from Gilberts Blackpool. Occupying the entire ground floor of the building,
Phase 1 of the diagnostic centre- run by Rutherford Diagnostics Ltd in partnership with Somerset NHS Foundation Trust- utilises mechanical ventilation as the most efficient means of adequately supplying and extracting air throughout the diverse spaces. It is critical that fixtures and fittings do not interfere with the highly sensitive equipment in use in the MRI rooms and magnetic forces generated whilst
the ventilation provided a clean airflow path. Thus, throughout the MRI Scan suite areas, a combination of Gilberts’ DGA4 louvred face diffusers and GECA egg-crate grilles, specifically manufactured in non- ferrous material and plastic PX extract valves have been used to provide compliant quality and volume of air in line with latest NHS guidance HTM03-01. In non-treatment areas and other clinical spaces,
mild steel versions of the DGA4 and GECA units supply fresh, filtered air which is extracted via Gilberts’ PG-R perforated face diffusers. In the main reception, Gilberts’ JSL jumbo slot diffusers in runs up to 12m have been installed, blending seamlessly into architectural design of feature ceilings with their “shadowgap” aesthetics whilst delivering an ultra high capacity of supply and extract airflow with strategically positioned plenum boxes along the lengths. Explained Dave Norcross, Steven A Hunt Projects Manager, “Our brief was to come up with a functional, effective design that complied with guidance for diagnostic facilities and HTM 03-01. We needed to ensure a good working environment for equipment and staff. We needed to deliver a clean, draught-free environment for patients that made a positive contribution towards minimising risk of infection by ‘scouring’ the space and being efficiently extracted.“We can rely on Gilberts to work with us to design and deliver, even when we require non-standard and/or specialised options. Its heritage within healthcare environment proves its ability to produce components that can meet the stringent demands of airflow and extraction in sensitive locations. As a result, we were confident we would have the support to complete the project on time and on budget.” Added Mike Moran, Chief Executive Officer
of Rutherford Health, “The importance of early diagnosis cannot be overstated. This centre is a major step forward in addressing the rising
34 BUILDING SERVICES & ENVIRONMENTAL ENGINEER APRIL 2022
diagnostic demand and managing the growing backlog caused by the pandemic. It is critical that every element of the building- including the ventilation- contributes towards patients get the best treatment as quickly as possible, to achieve an efficient pathway to better health.” The Diagnostic Centre is the latest in a line of healthcare environments for Gilberts, including Royal Preston Hospital, Papworth Hospital, the Harborne Hospital in Birmingham and Rowan View in Liverpool. The UK’s leading independent air movement specialist, Gilberts is unique in its ability to develop, in-house, components for natural or mechanical ventilation in commercial environments that answer changing market requirements. Its state of the art test centre, designed and built in-house, is one of the most technically advanced in the country.
www.gilbertsblackpool.com Read the latest at:
www.bsee.co.uk
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